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2e34949507
The next repo-local sweep target was ROADMAP #73: repeated backlog sweeps exposed that session writes could share the same wall-clock millisecond, which made semantic recency fragile and forced the resume-latest regression to sleep between saves. The fix makes session timestamps monotonic within the process and removes the timing hack from the test so latest-session selection stays stable under tight loops. Constraint: Preserve the existing session file format while changing only the timestamp source semantics Rejected: Keep the sleep-based test workaround | hides the real ordering hazard instead of fixing timestamp generation Confidence: high Scope-risk: narrow Reversibility: clean Directive: Any future session-recency logic must keep `current_time_millis`, ordering tests, and latest-session expectations aligned Tested: cargo fmt --all --check; cargo clippy --workspace --all-targets -- -D warnings; cargo test --workspace; architect review APPROVE Not-tested: Cross-process monotonicity when multiple binaries write sessions concurrently